A comprehensive operational efficiency evaluation method for waste water treatment plants(WWTPs)is established based on the Slack-based measure-Data envelopment analysis(SBM-DEA)method,and is used quantitatively to evaluate 174 WWTPs in 29 major cities in Shanxi,Henan,and Shandong provinces belong to the middle and lower reaches of the Yellow Riv-er basin.Factors influencing the comprehensive operational efficiency of WWTPs are identified by using the Kruskal-Wallis test.The results indicate that the average comprehensive operational effi-ciency of WWTPs in the study area was only 0.514 8,and there exist room for improvement by im-proving process type,sewage treatment load ratio,treatment scale,dosage intensity,and influent COD concentration.Based on these findings,this study puts forward recommendations for impro-ving the comprehensive operational efficiency of WWTPs.
关键词
污水处理厂/综合运行效能/减污降碳协同增效/松弛值测算模型/Kruskal-Wallis检验
Key words
WWTPs/Comprehensive operational efficiency/Coordinated pollution reduction and carbon emission reduction for increased efficiency/Slack-Based measure/Kruskal-Wallis test